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Neiman A Schimansky-Geier L Moss F Shulgin B Collins JJ 《Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics》1999,60(1):284-292
We study, in terms of synchronization, the nonlinear response of noisy bistable systems to a stochastic external signal, represented by Markovian dichotomic noise. We propose a general kinetic model which allows us to conduct a full analytical study of the nonlinear response, including the calculation of cross-correlation measures, the mean switching frequency, and synchronization regions. Theoretical results are compared with numerical simulations of a noisy overdamped bistable oscillator. We show that dichotomic noise can instantaneously synchronize the switching process of the system. We also show that synchronization is most pronounced at an optimal noise level-this effect connects this phenomenon with aperiodic stochastic resonance. Similar synchronization effects are observed for a stochastic neuron model stimulated by a stochastic spike train. 相似文献
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Previously reported endovesicular reactions in the cleavage of -nitrophenyl diphenyl phosphate by hydroxide (or fluoride) ions in vesicles of dihexadecyldimethylammonium bromide appear to be artifacts. 相似文献
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Buffer or CTACl-catalyzed basic cleavages of -- or -AA--Pro -nitrophenyl esters proceed mainly via intramolecular cyclization to diketopiperazines. These reactions are more facile with than with substrates. 相似文献
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The reliability of linear polymer structures determined by using electron diffraction data is investigated. The results of n-beam dynamical calculations and kinematic calculations which take account of crystal bending are compared with experimental structure factors for five published structures. In specific cases, both dynamical scattering and crystal bending effects are found to be important. Finally, guidelines are given for obtaining electron diffraction data which are optimal for structure solution. 相似文献
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Single axial mode pumping and external mirror operation of a pulsed spin-flip Raman laser at 10.6 μm
By the addition of an external cavity to a single axial mode, TEA CO2 laser pumped, In Sb spin-flip Raman laser, a tenfold increase in first Stokes output and a twenty-five fold increase in second Stokes and anti-Stokes outputs has been observed. 相似文献
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